Adaptive Selective Sidelobe Canceller Beamformer With Applications to Interference Mitigation in Radio Astronomy
Adaptive Selective Sidelobe Canceller Beamformer With Applications to Interference Mitigation in Radio Astronomy
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DOI：
10.1109/tsp.2013.2274960
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发表时间：
2013-10
影响因子：
5.4
通讯作者：
R. Levanda;Amir Leshem
中科院分区：
文献类型：
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作者：
R. Levanda;Amir Leshem
在强干扰源存在的情况下实现弱源的更好成像是在诸如射电天文学、SAR成像、SONAR和宽带信号处理等信号处理的各个领域中的主要挑战。我们提出了一种新的算法参数估计，可以实现时，使用移动阵列。该自适应波束形成器可用于合成孔径阵列射电天文、SAR成像、拖曳阵列声纳波达方向估计和宽带波达方向估计等领域。分析性能分析提供了一个新的射电天文阵列的模拟和测试。所有这些都表明，与目前使用的滤波器组技术（如MVDR）相比，在阵列视场内或视场外存在强干扰时，有了显著的改进。当使用定向天线时，后一种情况尤其重要。
Achieving better imaging of weak sources in the presence of strong interfering sources is a major challenge in various fields of signal processing, such as radio astronomy, SAR imaging, SONAR and wideband signal processing. We present a new algorithm for parameter estimation that can be implemented when a moving array is used. This adaptive beamformer can be employed in a variety of applications, such as radio astronomy with synthetic aperture arrays, SAR imaging, DOA estimation in towed array SONAR and wideband DOA estimation. Analytic performance analysis is provided together with simulations and tests on a new radio astronomy array. All these indicate a significant improvement compared to currently used filterbank techniques such as the MVDR, when strong interference is present, either inside or outside the field of view of the array. The latter case is especially important when directional antennas are used.